편광현미경을 이용한 전자적근관장측정기의 정확성에 관한 연구
Evaluation of the accuracy of the electronic apex locator using the polarizing microscope
박한수, 高福子,
소속 상세정보
박한수 ( ) - 서울대학교
高福子 ( ) - 서울대학교
KMID : 0362319920170010235
Abstract
The purpose of this study was to evaluate the accuracy of an electronic apex locator, the Neosono - M, in determining the location of the cementodentinal junction. A total of 26 teeth with 46 canals were evaluated. The apex locator was used to
locate
the file and the teeth extracted. The specimen were prepared with highspeed burs and sandpaper discs to a thickness of 250~300μm. Distances were measured from the cementodentinal junction with the use of polarizing microscope. Measurements made
by
the
apex locator were also compared with those by the X - ray.
@ES The results were as follows.
@EN 1. The apex locator and X - ray were to measure a mean value of 0.17, 0.45mm coronal to the CDJ respectively. There was no significant difference between the accuracy of the apex locator and that of X - ray.
2. There was no significant difference between the accuracy of apex locator in vital and in nonvital teeth, and between in narrow and in wide canals.
3. The files in nonvital and narrow group were apical to the CDJ significantly than those of vital and narrow, vital and wide, and nontival wide groups.
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